Morphological, histochemical and ultrastructural indicators of maize and barley leaf senescence

Kolodziejek, Izabella; Wałęza, Maria; Mostowska, Agnieszka

doi:10.1007/s10535-006-0089-y

Cited by 11 publications

(6 citation statements)

References 34 publications

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“…These plants usually contained also larger plastoglobuli, but the differences were not statistically significant. The alterations in chloroplast ultrastructure caused by WS share many common features with the development of senescence manifested as disappearance of starch inclusion, appearance of large plastoglobuli, and thylakoid swelling and dilatation (Kolodziejek et al 2003(Kolodziejek et al , 2007. Changes in water supply seem to affect the structural characteristics of chloroplasts differently in various plant species or cultivars (Ristic and Cass 1993).…”

Section: Resultsmentioning

confidence: 99%

Effects of abscisic acid or benzyladenine on pigment contents, chlorophyll fluorescence, and chloroplast ultrastructure during water stress and after rehydration

et al. 2006

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With the aim to contribute to the elucidation of the role of phytohormones in response of plants to adverse environmental conditions, seedlings of Phaseolus vulgaris, Nicotiana tabacum, Beta vulgaris, and Zea mays were supplied with water, 100 μM abscisic acid (ABA), or 10 μM N 6 -benzyladenine (BA) immediately before imposition of water stress (WS). In all four species, contents of chlorophylls (Chls) and carotenoids were markedly decreased during WS and after rehydration only in plants pre-treated with water but not in those pre-treated with ABA or BA. Contents of pigments of xanthophyll cycle increased during WS more in plants pre-treated with ABA or BA than in those pre-treated with water, but the degree of their de-epoxidation was highest in the later. Similarly, the efficiency of photosystem 2, determined as variable to maximal Chl fluorescence ratio, was not markedly decreased in bean plants pre-treated with ABA or BA in contrast to those pre-treated with water. The imposed WS was not severe enough to damage chloroplast ultrastructure. However, different changes in a size of starch inclusions were observed. In bean plants, the amount of starch increased considerably in plants pre-treated with water, while it decreased in BA pre-treated plants and no change was found in ABA pre-treated ones. The starch content declined under WS in sugar beet and tobacco plants but only moderate changes were found in ABA or BA pre-treated plants. Thus the application of BA and especially of ABA reduced the negative effects of subsequent WS.

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Section: Resultsmentioning

confidence: 99%

Effects of abscisic acid or benzyladenine on pigment contents, chlorophyll fluorescence, and chloroplast ultrastructure during water stress and after rehydration

et al. 2006

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“…The epicuticular wax of senescing leaf in C. camphora was almost identical to that of mature leaf. But the absence of epicuticular wax on an abaxial leaf surface has been observed on the senescing part of 20‐day‐old seedling leaves in maize and barley (Kolodziejek et al ., ). So during the leaf senescence of C. camphora , the change model of epicuticular wax is evidently different to that of herbaceous plants.…”

Section: Discussionmentioning

confidence: 97%

“…The structure and number of epicuticular wax crystals change with plant age, development, and environment (Raveh et al ., ). It plays an important role in plant resistance to various stresses, such as fungal pathogens, drought, solar radiation, freezing temperatures, and mechanical abrasion (Kolodziejek et al ., ). However, the apical and middle regions of leaf blades lack epicuticular wax during the natural leaf senescence of maize and barley (Kolodziejek et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Ultrastructural studies on the natural leaf senescence of Cinnamomum camphora

Cao

Song

et al. 2013

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The process of natural leaf senescence of Cinnamomum camphora (C. camphora)-a commercial tree in Asia, was investigated, focusing on changes in cellular ultrastructure, epicuticular wax, and stoma. The changes to mesophyll cells in a senescing leaf predominantly include degradation of the following cellular components: cytoplasm, the central vacuole, small vacuoles, and vesicles with a diameter smaller than 400 nm, which are involved in the degradation of chloroplasts. The sequence of change in epicuticular wax during leaf senescence was different from those in herbaceous plants by atomic force microscope and scanning electron microscopic analysis. Comparing with maturation leaves, senescing leaves develop a wider aperture in their stoma, which would delay the leaf senescence of C. camphora.

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“…The cover of epiphytic microorganisms on the upper surface of Abies grandis increased with age, which was correlated with decreased leaf water repellency of older leaves (Schreiber, 1996). The distribution of stomata and trichomes on leaf surface changes with growth stages, which also affects surface wetting properties (Fernández et al, 2014;Kolodziejek, Waleza, & Mostowska, 2006).…”

Section: Figurementioning

confidence: 99%

Variability in leaf wettability and surface water retention of main species in semiarid Loess Plateau of China

et al. 2018

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Leaf wettability, adhesion or repulsion of water drops, varies greatly among species and plays an important role in plant-soil hydrological relations. This study aimed to examine the variability in leaf wettability among species in different habitats and growth periods, and their relationships with plant surface water retention in the semiarid Loess Plateau of China. The leaf adaxial and abaxial contact angles, the surface water retention of leaves and individual plants, and general plant traits of 68 species belonging to 28 families were examined from May to August in 2017. Results showed that leaf water contact angles ranged from 27.3°to 133.4°and leaves with higher contact angles normally had lower variation coefficients. Leaf wettability was affected by internal properties (including leaf side, family, and leaf age) and external conditions (growth period), whereas the life form and slope aspect did not show significant effects. There were 47 species having higher contact angles on adaxial than abaxial surfaces, and the differences were significant in 23 species. Gramineous and leguminous species were more unwettable than compositae and rosaceous species. New leaves were more unwettable than old leaves. Surface wettability increased from May-June to July-August period. Leaf wettability was positively correlated with leaf surface water retention and was the best predictor of individual plant surface water retention compared with other plant traits. Leaf wettability showed interspecific differences associated with family and growth stage and can be a considerable variable in predicting canopy interception and evaluating vegetation hydrological function in drought environments.

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Morphological, histochemical and ultrastructural indicators of maize and barley leaf senescence

Cited by 11 publications

References 34 publications

Effects of abscisic acid or benzyladenine on pigment contents, chlorophyll fluorescence, and chloroplast ultrastructure during water stress and after rehydration

Effects of abscisic acid or benzyladenine on pigment contents, chlorophyll fluorescence, and chloroplast ultrastructure during water stress and after rehydration

Ultrastructural studies on the natural leaf senescence of Cinnamomum camphora

Variability in leaf wettability and surface water retention of main species in semiarid Loess Plateau of China

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